C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/00 (2006.01) C23C 22/08 (2006.01) C23C 22/22 (2006.01)
Patent
CA 2329326
When a phosphate ester or a dispersed wax is added to a conventional liquid phosphate conversion coating composition, the resulting phosphate coating formed on a metal substrate has a lower coefficient of friction after being oiled than it would have had if the additive had been omitted. The corrosion resistance and paint adhesion properties expected from the conversion coating are not substantially diminished by the additive. Particularly good results are achieved if the phosphate coating composition contains calcium and ferrous cations and the liquid phosphate conversion coating composition is dried into place on the substrate.
Lorsque l'on ajoute à une composition de couche de conversion classique de phosphatation, un ester phosphorique ou une cire dispersée, le revêtement phosphate qui en résulte sur un substrat métallique a un coefficient de frottement inférieur, après avoir été huilé, à celui qu'il aurait sans l'adjonction du produit d'addition. L'adjonction de ce produit d'addition n'altère pas les propriétés de résistance à la corrosion et d'adhérence de la peinture que l'on attend de cette couche de conversion. On obtient les meilleurs résultats si la composition de couche de phosphatation contient des cations calcium et des cations ferreux et si cette composition liquide sèche en place sur le substrat.
Henkel Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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